Chuck for high-speed drills.



J. o. REYNOLDS. CHUCK PoR-HIGH SPEED DBILLs. APPLICATION FILED DBO. 10, 1906.

Patented .11115120 Wl TNE SSE S y citizen of the United States, residing at y line 2-2 of Fig. 1; 3, a detail vie-a' shoivsleeve; Fig. 5, a detail side view of the self- JAMES o'. REYNOLDS, or

EVANSVILLE, INDIANA.

CHUCK FOR HGH-SPEED DRILLS.

Specification of Iietters Patent.

'Patented July 20, 1909.

Application led Decemberl, 1906. Serial No. 347,222.

To all whom it mag/concern: y

Be 1t known that I, J ,mns 0. REYNOLDS, a

Evansville, county of Vanderburg, and State of Indiana, have invented certain new l and useful Im rovements in Chucks for High-Speed Dril s` of which the following is a specification. y

This invention relates to chucks for high speed drills.

The object of the invention is the provi# sion 4of an improved chuck of the character set forth adaptable for use with either-short or long drills, wherein a novel construction of yielding spring-actuated drill holder is provided, in connection with novel locking means 'or catches and other improved parts, whereby the drill may be turned and the locking means quickly released or positioned for engagement with a series of engaging devices to hold the drill in different positions.

The invention also contemplates-the provision of novel means for supporting or guiding the drill which acts as an automatic selfccntering guide and dirt eXcluder.

'ihe adjustable drill holder and locking means enable the drill to be lengthened or shortened at the n illof the operator.

I The constructii'm. of the invention and the functions of its parts find full ex )lanation in the following specification, andl the novel features are recited inthe appended claims.

In the accompanying drawings: Figure 1 is a longitudinal section of the invention showing the large spring partly compressed and the drill locked Fig. 2, a cross-section on ing the drill in section, looking toward the driving bushing in the direction of the arrow of Fig. l; Fig. 4, a detail view of the cam sleeve; Fig. 4a, an end View of the cam centering'guide; and Fig. 6, a face view of the self-centering guide.

The shank 1 of the tool is provided with a Y tang 2 to fit in the drill. spindle and it is bored out or hollow at 3 andprovided n ith a reduced screw-threaded part 4.

My improved chuck has a hollon or tubular shell or casing 5 provided on its i nterior with a series of annular teeth 6, each of which has a shoulder and an inclined part, these teeth being arrangedin-f parallelcircu- Lil rings as integral parts 4`of the shell 5 and' having diametrically opposite grooves or channels 7 and 8. Bearing against the entf-r end of the shell or easing 5 is a driving bushing 9 (shown in detail in Fig. 3) which has a reduced screw-threaded part 10 screwed into the end of the shell 0r easing, andthereextends through this driving bushing, an openingll, vhich is composed of diarnetricallyv arts.

opposite and merging sector-shaped Screwed onto the outer end of the easing 5, at 1,2, is aretaining and clamping cap 13, .which has a semi-spherical concave or recess 14, which forms a socket for corresponding guide-sections and 16, each of which forms a. quarter-sphere, which are adapted to play side by side, said sections 15 and 16 being duplicates and each having flat faces l17 .Where they are juxtaposed and provided with'fiat bases 15 -which have pockets 18 that receive coil springs19 and 20, uhich bear against a Washer 21 lying against the driving bushing 9, but the adjacent faces 17 of the guide-sections 15 and 16 are cut out, as shoe-n at 22,

to form an o )ening which is just large.

enough to easiy receive the drill 23, the Washer 21 having 'a'slot through which the drill passes and said drill also lpasses through the opening 1].

The numeral 24 represents a camsleeve which has onecnd solid with' the exception of a slot 25 which receives thedrill 23,-said cam sleeve having opposite earn slots 26 and 27. Received Within the cam sleeve is a lockblock 28, against which bears the head 29 of a tubularpresser bar 30, which is' urOed by 'a catch s ring 31, said presser bar 30 s iding in Athe hol ow part 32- of the shell 1. The lockbloek 2 8 has a conical concave 33, against which the end of the drill 23 abuts. Secured to the lock-'block 28 are screw-pins 34, which lic in the cam slots 2 6 and 27 and are received in the grooves 7 -and 8. 4 o The numerals 35 represent locking dogs lying in eoncavities in o p'osite sides of the lock-block 2S and sprea or urged apart by catch spring 36 lying in a diametrical opening in said lock-block:

In using the chuck, the shank 1 is rst inserted in the machine spindle and the flat drill (Whether short or l'ong, narrow or broad) 23 is inserted through the slots 22 and 25 and seated in the concave 33, and pressed in so' far, (the lock block and cam sleeve retreating agamst the pressure of the spring 31) thatA only the desired extent of the drill protrudes from the chuck. By turning the drill to the right, the cam sleeve 24 is turned and the locking dogs released' and they then engage the nearest of the teeth. 6 and lock the parts against further inward movement. The cap 13 is then tightened and the engagement of.

the parts 15 and 16 of the guide with the washerZl causes said parts 15 and 16 to grip and lock the outer part of the drill so the spririg 31 cannot project said drill. -On loosening the cap 13 and turning the drill to theleft, the cam sleeve will engage and retract the locking dogs 35 and the drill can.

casing, of a drill holder movable freely lengthwise of the casing, and a releasable loc-kin device carried by and movable with the dril holder which is adapted for securing the drill holder to the casing at different desired positions thereof.

2; In a drill chuck, the combination with a casing, of a drill holder movable freely length wise of the casing, and means for locking' the-4 drill holder in different desired positions comprising a plurality of teeth on the casin and releasable locking means on the dri holder for engaging said teeth.

3. In a drill chuck, the combination with a casing having a plurality of successive annular teeth at different points along its length, of a drill holder movable lengthwise in the casing, locking means for engaging theteeth aforesaid, and means for disengaging the locking means from the teeth.

4. ln a drill chuck, the combination with a casinghavin a plurality of successive annular teeth at ifferent oints along its length, of a drill holder mova le freely lengthwise in the casing, locking means carried by the drill holder for engaging'or disengagihg the tee h aforesaid, and means o erated by indepenent mov ement of the drill for disengaging the looking means from the teeth.

5. In a drill chuck, the combination with a lshell or casing7 of a drill holder movable therein, releasable locking means for securing the drill holder at dierent points of the casing and adapted for disengagement from the casing when shifting the drill holder, and means operated by independent movement of the drill for operating the releasable locking means aforesaid.

6. In a drill chuck, the combination with a shellor casing having a plurality of teeth disposed at different points along the length thereofJ of a rotatable drill holder sleeve having cams, a lock-block having pins coperating with the cams on the,sleeve,1neans on the casing engaging the pinsand a locking niember carried by the lock-block and engageable. with the teeth and sleeve.

7. I'n a drill chuck, the'conibination witli'a shell or' casing, of an outwardly spring-actuated drill holder, and releasable means for locking the drill holder at different desired positions.

In testimony whereof, l hereunto affix my signature in presence of two. witnesses.

JAMES O. REYNGLDS.

Witnesses: f

' PERoY C. I-IoPKINs,

F. C. GORE. 

